Altera Advanced SEU Detection IP Core - Manual (Page 19)

The .smh contains a mask for design sensitive bits in a compressed format. The sensitivity mask is
generated for the entire design. Hierarchy tagging provides the following benefits:
• Hierarchy tagging provides the following benefits:
• Increases system stability by avoiding disruptive recovery procedures for inconsequential errors.
• Allows diverse corrective action for different design logic.
Using Partitions to Specify Logic Sensitivity ID
In the Quartus II software, you can designate a design block as a design partition. You can then assign a
sensitivity value to the partition.
The
PARTITION_ASD_REGION_ID
global assignment specifies the numeric value from 0 to 16. The value
represents the sensitivity tag associated with this partition:
set_global_assignment -name PARTITION_ASD_REGION_ID -section_id
A sensitivity tag of 1 is the same as no
PARTITION_ASD_REGION_ID
assignment, specifying basic sensitivity
level: "region used in design". If a soft error occurs in this partition, the error is reported back as a critical
error in the sensitivity region 1.
A sensitivity tag of 0 is reserved, as indication that CRAM bits are not used in your design. You can
explicitly set it to indicate that partition is not-critical, and force the partition to be completely excluded
from the sensitivity mapping.
Note: You can create multiple partitions with the same sensitivity tag in a design.
Design Partitions Properties
Specify the sensitivity ID assigned to the partition in the ASD Region column in the Design Partition
window.
Figure 12: ASD Region Column in the Design Partition Window
Sensitivity Map Header File Lookup
The .smh contains critical bit information about the design. The sensitivity data is generated as a standard
Intel hex (big-endian) .smh file during .sof generation.
ALTADVSEU
2015.05.04
Using Partitions to Specify Logic Sensitivity ID 19
Altera Advanced SEU Detection IP Core User Guide Altera Corporation
Send Feedback